Question

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describing catalyst function
what happens to the rate of a chemical reaction when the activation energy is decreased?
it slows down.
it speeds up.
it remains the same.
it stops.

Explanation:

Catalysts work by lowering the activation energy of a chemical reaction. When activation energy is decreased, more reactant particles have enough energy to react, so the reaction rate increases (speeds up). Slowing down, remaining same, or stopping don't align with the relationship between activation energy and reaction rate.

Answer:

It speeds up.